ISSN : 1225-3480
The purpose of the present study is to know the reproductive characteristics of Octopus minor focusing on monthly variation of total weight and gonadosomatic index, fecundity, group maturity for management of the species resource effectively. Gonadosomatic index peaked June in females. The fecundity ranged from 89 eggs at 123.6 g to 200 eggs at 238.1 g of total weight. The relationship between total weight (TW) and fecundity (F) was F = 1.291TW0.908 (r2 = 0.85) and fecundity increased with total weight. The relationship between mantle length (ML) and total weight (TW) was TW = 1.939ML1.991 (r2 = 0.82) in female, TW = 1.566ML2.167 (r2 = 0.84). The total weight at 50% group maturity was estimated to be 158.0 g for sex combine.
Chang, D.J. and Kim, D.A. (2003) Characteristics by behaviour and habits of the Common octopus (Octopus minor). Korea Journal of Fisheries and Aquatic Sciences, 36: 735-742.
Head, M.A., Stokes, G.L., Thorson, J.T. and Keller, A.A. (2016) Techniques for improving estimates of maturty orives in groundfish using double-reads and measurement error models. Fisheries Research, 179: 251-258.
Kim, B.G. (2003) Reproductive ecology and seeding production of the octopus, Octopus ocellatus on the west coast of Korea. Ph.D. Thesis, Kunsan National University, 1-102.
Kim, D.S. (2000) Development of breeding technique for Octopus minor. Case Reports on the Propagation of Outstanding Fisheries Techniques. Ministry of Maritime Affairs and Fisheries, Korea, 5-24.
Kim, D.S. and Kim, J.M. (2006) Sexual maturity and growth characteristics of Octopus minor. Korea Journal of Fisheries and Aquatic Sciences, 39: 410-418.
Kim, D.S. and Kim, J.M. (2007) Spawning and hatching of Octopus minor. Korea Journal of Fisheries and Aquatic Sciences, 40: 243-247.
Kim, S.T., Kim, J.Y., Kim, J.I. and Hwang, S.D. (2004) Growth and spawning of common Octopus (Octopus minor) in southern coast of Korea. Proc. Symp. Fish. Sci. Soc., 2004: 362-363.
Kim, Y.H., Lee, S.K., Kim, H.J., Ju, S.M. and Lee, J.S. (2017) Sexual group maturity, fecundity and reproductive cycle of Octopus minor (Cephalopoda: Octopodidae). The Korean Journal of Malacology, 33: 13-20.
Lee, S.H., Shin, M.G., and Kim, Y.H. (2017) Fisheries biology of Octopus minor in the Deukryang Bay in the Southern coast of Korea. The Korean Journal of Malacology, 33: 179-183.
Lee, S.S., Park, J.J., Shin, Y.K., Kim, H. and Jeon, M.A. (2014) Sex change and sequential hermaphroditism in Tegillarca granosa (Bicalvia: Arcidae). Invertebrate Reproduction & Development, 58: 314-318.
MAFRA. (2018) Statistic database for fisheries production. Retrieved from http://fs.fips.go.kr/main.jsp on June 1.
Oh, T.Y., Kim, J.I., Seo, Y.I., Lee, S.K. and Choi, M.S. (2012) Distribution characteristic of Octopus minor in the Tando Bay on the southwest coast of Korea. Journal of the Korean Society of Fisheries Technology, 48: 370-378.
Yamamoto, T. (1942) On the ecology of Octopus variabilis typicus (Sasaki), with special reference to its breeding habits. Venus, 12: 9-20.
Yusa, Y. (2007) Causes of variation in sex ratio and modes of sex determination in the Mollusca - an overview. American Malacological Bulletin, 23: 89-98.
